... to improve the growing conditions for cultivating fishes, shrimps, crabs, shells and clams.Efficacy:Our company new generation of " ... designed to improve the growing conditions for cultivating fishes, shrimps, crabs, shells and clams. It is featured by pond-fattening, ... kinds of sea water or fresh water breeding fish, shrimp, crabs, shellfish, algae, etc.Use instruction: 1- Initial use at water ...